Estimation of the westward auroral electrojet current using sparse magnetometer chain data
We investigate 1-D models of the westward substorm electrojet using magnetic field observations along a meridian chain of stations. We review two respective linear models from Kotikov et al. (1987) and Popov et al. (2001) with a large number of elementary currents at fixed positions. These models ca...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-38-109-2020 https://noa.gwlb.de/receive/cop_mods_00050399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050010/angeo-38-109-2020.pdf https://angeo.copernicus.org/articles/38/109/2020/angeo-38-109-2020.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00050399 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00050399 2023-05-15T18:45:33+02:00 Estimation of the westward auroral electrojet current using sparse magnetometer chain data Evdokimova, Marina A. Petrukovich, Anatoli A. 2020-01 electronic https://doi.org/10.5194/angeo-38-109-2020 https://noa.gwlb.de/receive/cop_mods_00050399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050010/angeo-38-109-2020.pdf https://angeo.copernicus.org/articles/38/109/2020/angeo-38-109-2020.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-38-109-2020 https://noa.gwlb.de/receive/cop_mods_00050399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050010/angeo-38-109-2020.pdf https://angeo.copernicus.org/articles/38/109/2020/angeo-38-109-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/angeo-38-109-2020 2022-02-08T22:36:54Z We investigate 1-D models of the westward substorm electrojet using magnetic field observations along a meridian chain of stations. We review two respective linear models from Kotikov et al. (1987) and Popov et al. (2001) with a large number of elementary currents at fixed positions. These models can be applied to a magnetometer chain with many magnetic stations. A new nonlinear method with one current element is designed for cases with a small number of stations. We illustrate the performance of these methods using data from the IMAGE (International Monitor for Auroral Geomagnetic Effects) and Yamal Peninsula stations. Several corrective measures are proposed to account for unphysical solutions or local extrema from the optimized functions. We also advertise a generic maximum likelihood approach to a problem that is feasible for any empiric model. Article in Journal/Newspaper Yamal Peninsula Niedersächsisches Online-Archiv NOA Yamal Peninsula ENVELOPE(69.873,69.873,70.816,70.816) Annales Geophysicae 38 1 109 121 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Evdokimova, Marina A. Petrukovich, Anatoli A. Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
topic_facet |
article Verlagsveröffentlichung |
description |
We investigate 1-D models of the westward substorm electrojet using magnetic field observations along a meridian chain of stations. We review two respective linear models from Kotikov et al. (1987) and Popov et al. (2001) with a large number of elementary currents at fixed positions. These models can be applied to a magnetometer chain with many magnetic stations. A new nonlinear method with one current element is designed for cases with a small number of stations. We illustrate the performance of these methods using data from the IMAGE (International Monitor for Auroral Geomagnetic Effects) and Yamal Peninsula stations. Several corrective measures are proposed to account for unphysical solutions or local extrema from the optimized functions. We also advertise a generic maximum likelihood approach to a problem that is feasible for any empiric model. |
format |
Article in Journal/Newspaper |
author |
Evdokimova, Marina A. Petrukovich, Anatoli A. |
author_facet |
Evdokimova, Marina A. Petrukovich, Anatoli A. |
author_sort |
Evdokimova, Marina A. |
title |
Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
title_short |
Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
title_full |
Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
title_fullStr |
Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
title_full_unstemmed |
Estimation of the westward auroral electrojet current using sparse magnetometer chain data |
title_sort |
estimation of the westward auroral electrojet current using sparse magnetometer chain data |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/angeo-38-109-2020 https://noa.gwlb.de/receive/cop_mods_00050399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050010/angeo-38-109-2020.pdf https://angeo.copernicus.org/articles/38/109/2020/angeo-38-109-2020.pdf |
long_lat |
ENVELOPE(69.873,69.873,70.816,70.816) |
geographic |
Yamal Peninsula |
geographic_facet |
Yamal Peninsula |
genre |
Yamal Peninsula |
genre_facet |
Yamal Peninsula |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-38-109-2020 https://noa.gwlb.de/receive/cop_mods_00050399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050010/angeo-38-109-2020.pdf https://angeo.copernicus.org/articles/38/109/2020/angeo-38-109-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/angeo-38-109-2020 |
container_title |
Annales Geophysicae |
container_volume |
38 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
121 |
_version_ |
1766236626277629952 |